I've seen a few here swear by the Windstopper, but I'm leaning towards getting either a Elite or Touring jacket, and the SP cap integrates with them. But if one's significantly better than the other I'd like to hear about it.

I just got the showerpass jacket and pants a few weeks ago, and the hood yesturday,ive only worn the jacket so far, but im gonna be satisfied with the whole outfit.its great and fit real good,e-vent breathes better then gortex and windstopper,So its hard to make a choice,but im happy with what i got, joe

As a year round cyclist and baldy I'm quite the aficionado of skull caps. I have the Craft model. It's ok. The fit is a bit loose and it isn't contoured, so it doesn't fit as well as I'd like. Still, it's a great idea, well made using top notch materials.

My current favorite is one by Borah for $15. So far, it's never cold, never hot, never felt damp, even in 40* rain yesterday.

I have used the craft windstopper cap for 2 years and am very happy with it.

+1 I like it plenty. But I'm not doubting there might be even better ones out there.

The windstopper on mine is on the panel on the front only. It breathes well, keeps me warm, fits under the helmet. The only thing I wish it had was windstopper over the ears for that little extra but it's not a deal breaker. Also It's not my favorite to wear off the bike, I like my smartwool skull cap much better. Very soft and comfy. But it's not good on the bike.

Windstopper works really well. It's available in many brands. I have a Mountain Hardware beanie, Outdoor Research clava; MH, Marmot and Gore Bike Wear jackets; a Castelli jersey; GBW leg warmers.

Robert Gore and colleagues invented "porous Teflon", "Expanded Polypetrafluouroethylene (EPTF)". Windstopper is a version of this. After the patent expired, a lot of companies jumped on it, giving it their own tweaks. eVent is the most famous. If a "laminate/membrane" is in the product description, it's almost always Gore's EPTF matrix, minus attribution, because now it can be made cheaply without paying royalties, and who wants to spend money on developing a new chemical from scratch?

Gore's membrane is nice. It's not perfect. If you have open-weave material only, like wool or fleece, it has to be thicker (including using multiple layers) to provide equivalent warmth, but the benefit is it evaporates sweat faster, if staying drier is a top priority. If you use a totally wind-and-water-impervious material, like ordinary polyurethane on nylon/spandex, it's cheap and blocks wind 100%, but you get wet from sweat faster.

For rainy riding, Gore's EPTF membrane has proven to be so great that the vast majority of apparel mfrs use it. Now venting design becomes important. What helps to improve bulk air flow, and sweat exit? Pit zips. (Dual direction zips that can be opened starting either at the chest or under the arm are best, but most jackets have only one-way starting from the arms.) Pockets on the side with mesh lining that can be opened to permit airflow. Velcro cuffs that can be opened to act as airflow scoops in warmer conditions. A back vent to expedite sweat vapor exiting. Dual-action front zippers that can be opened from the bottom not just the top.